KamugishaM. L., GesaseS., MinjaD., MgemaS., MlwiloT. D., and MayalaB. K. “Pattern and Spatial Distribution of Plague in Lushoto, North-Eastern Tanzania”. Tanzania Journal of Health Research, Vol. 9, no. 1, June 2007, pp. 12-18, doi:10.4314/thrb.v9i1.14286.